尝试
I would like to fly in space.Absolutely.That would be cool.I used to just do personally risky things， but now I’ve got kids and responsibilities， so I can’t be my own test pilot.That wouldn’t be a good idea.But I definitely want to fly as soon as it’s a sensible thing to do.
On haters: "If you never want to be criticized， for goodness' sake don't do anything new."
I think as technologists we should have some safe places where we can try out new things and figure out the effect on society.
If you’re changing the world, you’re working on important things. You’re excited to get up in the morning.